Clamshell package



FIG. 1 is an upper front left perspective view of a clamshell package showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a left side elevation view thereof; and,

FIG. 7 is a rear elevation view thereof.

The broken lines shown in the views represent unclaimed subject matter and form no part of the claimed design. 

The ornamental design for a clamshell package, as shown and described. 